Why Grow Rebloomers?

by Betty Wilkerson

In the world of irises, there are different guidelines for garden judging and exhibition judging.  What is the difference, you ask? Show bench irises for exhibition only have to look good, and be good, for one day.

'Summer Radiance' (Wilkerson 96)

Garden judging involves how an iris appears in the garden, not for just one day, but for the full iris season. It also assesses plant health, branching, bud count, and sequence of bloom, among other things.  Sequence of bloom not only involves how the blooms open on the stalk, one at a time, two at a time etc., but how the stalks extend from the iris clump.  For instance, an iris I grew years ago had approximately 15 stalks and they all opened the terminal buds on the same day, and then it bloomed all of the first branch primary buds a couple of days later. Yes, it was beautiful, but the clump was finished blooming in just a few days. An iris that puts up one stalk at a time, like 'Summer Radaince,' displays its beauty for a much longer time.

'Vanishing Act' (Wilkerson 2004)

'Echo Location' (Wilkerson 2007)

'Returning Chameleon' (Wilkerson 1995)

When you hear people speak of their remontant irises, they are talking about reblooming irises. Reblooming irises extend the length of bloom per season, per iris. Since there are only two or three fall shows for reblooming irises in the United States of America, most of my focus is on hybridizing good garden qualities.  I'm particularly fond of irises that are dependable for rebloom, as are those shown on this page.

Seedling # 1907-10Re 

My interest in rebloom began over 30 years ago, because I love iris blooms so much that spring bloom was not enough for me.  I'm as thrilled with one bloom as most people are with a whole clump!  When planting a new rebloom bed in my garden, I first research the cultivars that rebloom well in my area, zone 6. Second, I plant them in a good spot.  Third, I make sure I water and fertilize them well.  Nevertheless, there are no guarantees! We are still bargaining with Mother Nature.

As a breeder, I have the added advantage of seeing seedlings, like 1907-10Re, that others may never see. Ask any questions you like.  Enjoy!

Breeding Tall Bearded Rebloomers in Kentucky: Focus

By Betty Wilkerson

The shortest point between two objects is a straight line.  If you want  to create rebloomers, even fall rebloomers, you need to cross two rebloomers.  'Feed Back' and 'Violet Miracle' were a part of my early collection.  They are both purple and were quite popular at the time.  'Feed Back'  produced many rebloom stalks throughout the summer, but often produced short stalks. 'Violet Miracle' is tall and well branched but doesn't rebloom a lot in my garden.  A cross between the two seemed to be a reasonable path.

A direct hit came from crossing 'Feed Back' x 'Violet Miracle' which produced 'Star Gate,' which has great branching, a great bud count, and reblooms in many zones within the US.  I would have preferred to reverse this cross but it just didn't happen.  'Star Gate', though, has helped produce a number of rebloomer seedlings in various shades of purple and white.

'Star Gate' (Wilkerson 2005)

'Feed Back' (Hager 1983) Photo contributed by Colleen Modra

'Violet Miracle' (Zurbrigg 79)

Two of these reblooming seedlings produced my rebloomers 'Another Bridge' and 'Theme Master.' CF2-1Re: (A1-1Re: ('Autumn Encore' x 'Roman Lover') x 'Feed Back') X G18-1Re: (E38-1: ('Orbiter' x 'Feed Back') x 'Violet Classic'). The three strongest seedlings survived and all three rebloomed, but only these two were introduced.

'Another Bridge' (Wilkerson 2005)

'Theme Master' (Wilkerson 2004)

Most of these have been used, with various success, in an attempt to produce red rebloomers. 'Star Gate' has produced many red seedlings still being used in my red program.  Only the future will tell what may result.

Breeding Reblooming Irises: An Eye to the Future-2

by Betty Wilkerson

Zone 6, KY

An Eye to the Future-2.

People love to talk about their favorite finds in the seedling patch.  Dr. Lloyd Zurbrigg talked about ‘Renown’ because it was a seedling that rebloomed well for him.  Then he introduced it in 1992.  There were many reports of it reblooming throughout the country.  After a false start (growing an iris as ‘Renown’ that was incorrect) I finally got the real ‘Renown’ the summer after I moved to Allen County in 2003.  The first bloom was ugly and I questioned the authenticity.  In 2005 I grew ‘Renown’ it an upper bed and it blossomed very well!  I’ve used tons of pollen from this bed, since my final success.  ‘Renown’ reblooms in garden zones north of mine, yet only one stalk has developed here in the off season.  

'Renown'  (Zurbrigg 1992)

I decided to do some serious breeding with ‘Renown.’  It was a bit of a research project for me and there are several seedlings that I like. At this point, my favorite ‘Renown’ seedling, 2155-01, is from (Treasured x Renown.)  This seedling was a sole survivor from about 50 seed.  It has given some lovely seedlings.  I was going to name it ‘Wormhole,’ but I was told the name would offend Dr. Zurbrigg!  Hope springs eternal in my reblooming heart, so it’s been introduced this year as ‘About Tomorrow.’  It’s my belief this is a very good iris.  It’s not missed a spring since maiden bloom, it has always given a good stalk to fan ration, and it’s very pretty, for a white!    

'About Tomorrow' (Wilkerson 2013)

'About Tomorrow' (Wilkerson 2013) 

After a winter of gnashing of teeth, and wringing of hands, I decided to spend my 2013 spring working toward strong chances of rebloom.  Only a handful of irises rebloom well here, so I decided they would be a good match with ‘About Tomorrow.’  I was also looking for tangerine beards so I searched the blooming irises for something that rebloomed for me and had the right beards.  Seed are now waiting to be planted from ‘About Tomorrow’ by ‘Cameo Blush’ and ‘Summer Radiance.’

'Cameo Blush' (Weiler 1998) 

Photo by Loic Tasquer

'Summer Radiance' (Wilkerson 1996)

One day I had a couple of blooms in my hand and didn’t know what to do with them, so, now, I have seed waiting from ‘About Tomorrow’ X ‘Star Gate.’ Although  'About Tomorrow' is white, I expect this cross will breed to the blue/purple side since the two share ‘Violet Miracle’ genes.  

'Star Gate' (Wilkerson 2005)

'Violet Miracle' (Zurbrigg  79)

At the end of August, I’m enjoying bloom on 1907-10Re.  It is a sibling of ‘Cool Character.’  1907-10Re bloomed all summer in 2011 without missing a day. It looks like I need to line this one out and consider introducing it.  It's still purple but it has many good qualities. Maybe the next generation will have other colors!  

1907-10Re (Wilkerson seedling) 

There are more seeds resting in the envelope rack.  They will all be planted in pots this fall.  Once again, I’ve enjoyed sharing the workings of my mind and the reasoning that went into making the latest crosses.  Will any of them produce good rebloomers of introduction quality?  I really think the potential is here.    

Breeding Reblooming Irises: An Eye to the Future-1

by Betty Wilkerson

Zone 6, KY

Crosses in 2013

My labor of love is to create unique reblooming irises for cold climates, but nothing is reblooming in my garden right now, so I thought I'd take you into the reblooming fantasy garden of my mind.  How can I do that?  By showing you irises I have hybridized that have reblooming genes that I intend to cross again to get reblooming irises in a wider variety of colors.  

A few years ago, Australian hybridizer Barry Blyth recommended that hybridizers take pictures of the parent flowers as they make crosses.  Such a brilliant idea that I should have thought of it myself! (insert smiley face)  So now I carry a digital camera in my hybridizing bag, along with notebook, pen and hybridizing tags. The trick is to remember to take the pictures when I make the cross!  So the photos below are my field pictures, part of the documentation of the painstaking and lenghty hybridizing process of producing better flowers for your garden.

People say they are tired of the "default" rebloom colors of yellow, white, and purple.  These are basically the result of dominant genes.  Other colors and some patterns require the use of recessive genes.  Over the past ten years, I've worked to fold in patterns and colors that did not exist in older cold climate rebloomers.  Recessive genes are required for the tangerine factor.  This is how we get pink, orange, yellow with a red beard or white with a red beard.  Certain patterns, like the Emma Cook pattern, are recessive.  Plicata is even recessive to selfs or single colored irises.  For the past ten years I've been working hard to fold these recessives into my seedlings.

This year, I'm crossing back for rebloom.  It's going to be difficult since the summer rebloom genes appear to be among the most rare!  I've crossed my reblooming irises and seedlings (irises that have not been registered or introduced) onto each other, and to a few seedlings with half rebloom genes that refuse to rebloom for me, in an attempt to achieve this goal.  

One such cross is, well, YELLOW.   Although I'm not crazy about all yellow irises, I'm fond of most of these 'Summer Radiance' children, due to their improved form and  their intense colors.  This 2013 cross will be used to get a nicely formed and vivid rebloomer.

                                                                       

1802-01P (Wilkerson Seedling) 

2151-01 Wilkerson Seedling

Once again, 'Summer Radiance' was outstanding, and its pollen was very fertile and it took on several things.  From the rebloom perspective, there is a lot of potential in these new seed pods!  

'Summer Radiance' clump (Wilkerson 1996)  

I have a number of seedlings I call "The Kitchen Sink Kids" because they have so many different genes in them that come from a reblooming iris numbered 1810.  ( 1605-01:9415-1Re((('Victoria Falls' x 'Vanity') x 'Immortality') x ('Latest Style' x 'Glistening Icicle'))) x ('Feedback' x 'Champagne Elegance') X 'Light Rebuff.' for those of you who must know.)   It seemed like a good idea to hit them with a bunch of rebloomers.  There were several good takes on 1810-15Re below,  the best rebloomer, and one take on 1810-01Re.  There were over twenty rebloomers, some summer and some fall,  from this cross.  Sadly, none met my requirements for introduction.  Here are two of the parents from 1810 I am using to get better form and color in rebloom.

1810-15Re (Wilkerson Seedling) 

                                                                  

1810-01Re (Wilkerson Seedling)  

Pollen from ‘Summer Radiance,’ a known parent of rebloomers, took on 1810-01Re.   I have several more to share with you on my next post, so stay tuned!  

I'm finding 'Renown' to be a good parent for plant qualities, but unfortunately, none of its children have rebloomed.  Pollen from seedling #2310-02 ('Decadence' X 'Renown,') ‘About Tomorrow,’ and ‘Returning Chameleon’ took on 1810-15re, which is exciting, because 1810-15-re often blooms all summer and into fall.  'About Tomorrow' is from 'Treasured' x 'Renown' and gives beautiful and diverse children.  I just can't wait to see these babies.  

                                                                 

2310-02 (Wilkerson Seedling) 

                                                                   

'About Tomorrow' (Wilkerson 2013)

  

'About Tomorrow' Top View (Wilkerson 2013) 

                                                                       

'Returning Chameleon' (Wilkerson 1995) 

Even though it was a bad year for hybridizing,  I was able to get a dozen good reblooming crosses for the future.  For the next step, I stripped blooms from the large plantings of my strongest rebloomers, 'Returning Chameleon', 'Summer Radiance,' 'Echo Location,' 'All Revved Up' and 'Star Gate' and carried them from bed to bed looking for good mates.  More about these later!

I also used a number of seedlings that are rebloomers, but haven’t met my criteria for introduction.   But hope springs eternal in the world of reblooming iris creation.  Wish me luck! 

Do you have any questions about how your lovely rebloomers are created?  Leave your questions and comments below and I will do my best to answer.